Improvement in elevators



. .Tiff/75) nPETERs PHOTO-LIYHDGRAPMER, WASH NGTON D C UNITED STATESPATENEOFFIGE.

ERWIN T. HOPE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN E'LEVATO RS.

Specification forming part of Letters Patent N0. 81,276, dated August18, 1868.

To all 'whom it may concern:

Be it known that I, ERWTN T. HOPE, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a new and improvedElevator; and l do hereby declare that the following is a full, clear,and exact description thereof, which will enable those skilled in theart to make and use the same, reference being had to the accompanyingdrawings, forming part of this specication.

The nature of this invention relates to improvements in elevators, suchas are used in hotels, warehouses, 85o.; the object of which is toprovide a hydraulic elevator of more simple and cheaper constructionthan those now in use.

It consists of an arrangement of a series of vertical telescopic tubesand a plunger, on the top of which the carriage is supported, and movedbetween suitable vertical guides, when the said telescopic tubes areextended by the action of water forced in at the bottom to the lowertube, which is stationary.

Figure l represents a sectional elevation of my improved elevator, andFig. 2 represents a plan view of the same.

Similar letters of reference indicate corresponding parts.

A represents avertical stationary tube, provided with anl enlarged base,which is firmly secured to a suitable bed. It is also provided with aflange, C, at the top, in which a stuffing box, D, is fitted, and bywhich it is connected, by the rods E, to a similar ange, F, of a movabletube, G, which is tted to work as a plunger within the baslof the tubeA.

Any suitable number of such tubes may be arranged 011e within the other,to rise one out of the other by the action of the water, when forced inat the bottom, and connected by the rods E, to prevent each tube beingforced too high on the uppermost tube; or it may be a solid plunger.

A carriage, H, is supported and provided with slides, I, to work in thegrooved posts or guides K K. I prefer to make the slides double on eachside, and separate them as much as possible, for the purpose of givinggreater stability to the carriage.

L represents springs, ranged around each cylinder and between the same,for the purpose of preventing serious results from concussion when thetubes settle down together. I also propose to provide similar springsbe-A tween the heads of the rods E and the iianges ot' the tubes, for asimilar purpose, when the tubes are being extended.

Each succeeding tube should be made as much longer than the precedingone as the length of the stuffing-boxes, so that, when they are in acontracted position, all the tubes will reach to the bottom of the fixedtube A; and they may be so arranged that, when the water is introduced,the lowest tubes will rise rst, and the next succeeding, or the topmostmay be moved rst.

M represents a rod, connected at the bottom with a three-way cock, N,and running to the top of the ways, whereby the ow of water into thetubes for elevating the carriage may be stopped -by persons on thecarriage, or on any of the floors, and whereby the cock may be turned toallow the water to flow out, for the purpose of allowing the carriage todescend.

The top of the rod is provided with an arm, O, which, projecting intothe path of the carriage, will be moved thereby to close the cock, andprevent the further ascent of the carriage when it has arrived at thehighest point which it is desired to allow it to go. Another a-rm maylalso be provided at the bottom, to close the cock, and thereby stop thedescent of the carriage at any point.

I claim as new, and desire to secure by Letters Patent- 1.Thecombination,withthetelescopictubes, of a carriage, H, and ways K,substantially as and for the purpose described.

2. The combination, with the telescopic tubes, of the rods E andcushions L, substantially as and for the purpose described.

3. The combination of the telescopic tubes, provided with cushions Landstufngboxes D, and connected by rods E, the grooved Ways K, carriage HI, three-way cock N, and rod M, having arms, as described, allsubstantially as herein set forth and shown, for the purposes specified.

ERWIN T. HOPE.

Witnesses T. L. LAUBACH, HENRY D. MOORE.

